Thank you for responding, Lionel. Actually, someone at work gave me this query to run which does what I was looking for substituting in the metaclasses I want to put on the diagram. I believe you have to be in admin mode to run this query though. Select [MetaClass] Into @Class1 Where [Name] = &"1. MetaClass Name" Select [MetaClass] Into @Class2 Where [Name] = &"2. MetaClass Name" Select [MetaClass] Into @Class3 Where [Name] = &"3. MetaClass Name" Select [DiagramType] Where (([DiagramTypeParam].[DiagramTypeObject].[MetaClass] in @Class1) And ([DiagramTypeParam].[DiagramTypeObject].[MetaClass] in @Class2) And ([DiagramTypeParam].[DiagramTypeObject].[MetaClass] in @Class3))
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